Paper box and blank therefor.



H. M. RUSSELL. PAPER BOX AND BLANK THEREFOR. APPLICATION FILED FEB. 23. 1916.

Patented June 27, 1916.

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HARLOW M. RUSSELL, OF CHELSEA, MASSACHUSETTS.

PAPER Box Am) BLANK THEREFOR.

Specification of Letters Patent.

Patented June 2'2, 1916.

Application filed February 23, 1916. Serial No. 79,887.

T 0 all whom it may concern:

Be it known that I, HARLOW M. RUSSELL,-

of Chelsea, in the county of Suffolk and State of Massachusetts, have invented cer- 5 tain new and useful Improvements in Paper Boxes and Blanks Therefor, of which the following is a specification.

This invention relates to the manufacture of paper boxes having reinforced walls, and refers particularly to that type of box having a substantially rectangular central portion provided with four flaps or extensions which are folded over upon each other and locked in folded position.

The object of my invention is to provide improved box members having doubled portions which may be shipped in flat condition and are then adapted to be conveniently set up for use, the box when set up having all four of its walls of equal height.

With these and other objects in view my invention consists in the improved structure of blank or box made therefrom substantially as hereinafter described and claimed.

Of theaccompanying drawings, Figure 1 is a plan .view of my improved blank, broken out in the middle to reduce the size of the figure. Figs. 2, 3, 4 and 5 are perspective views illustrating the successive steps of converting the blank shown in Fig. 1 into a final shape to constitute either the receptaclemember, or the cover member, of a box.

Similar reference numerals indicate similar parts in all of the views.

Referring first to Fig. 1, the rectangular central portion 12 is provided with wings or extensions comprising side wall portions 13, 14 and end wall portions 16, 17 and 18. It is to be understood here that the use of the terms side and end is for convenience of description and not for purposes of limitation. For instance, if the portion 12 is perfectlysquare, the said terms side and end would be indeterminate. The side wall portions 13 are provided with extensions or flaps 18 the outer side edges of which are slightly cut away so that said flaps 18 are slightly narrower than the portions 13 and the portions 14 are formed or provided with extensions 19, the inner edges of which, adjacent the extensions 18, are cut away. The object of this structure will 65 be hereinafter explained. The crease lines on which the blank is folded are indicated at 20, 21, 22, 23, 24, 25- and 26.

When the blank is converted to ,box form, the portions 14 are first folded upon the lines 24, in upon the portions 13, and are preferably adhesively secured thereto. This condition of the blank is indicated in Fig. 2. In this flat form the blanks can be shipped to the user, who, in order to set up the box, first turns up the side wall portions-upon the crease lines 20, to upright position, as indicated in Fig. 3. Next the extensions 18 and'19 are turned in as indicated in Fig. 4, and finally the portions 15, 16 and 17 are carried over to the position indicated in Fig. 5, this being effected by first turning up the end portions upon the lines 21, then folding the portion 16 over the extensions 18, 19, bending upon the crease line 22, and finally pressing the portion 16 against the inner surface of the extensions 19, this latter act causing the portion 17 to lie fiat against the bottom 12. This locks the parts in inter-folding positions because of thestrpcture which I will now explain in detai As best shown in Fig. 1', the portions 16 are of less length than the adjoining portions 15, 17 so that the ends of each portion 16 will bear against the inner surface of portion 14 when folded to the condition illustrated in Fig. 5, the ends of the portion 17 snapping under the edges of the portion 14. As shown in Fig. 1, the crease lines 21, 25 and 26 are not in alinement; that is, each pair of crease lines 25 are slightly nearer each other than each pair of crease lines 21, and each pair of crease lines 26 are slightly nearer each other than each pair of crease lines 25. In other Words the portions 13 are of less length than the portion 12, and the portions 14 are of less length than the portions 13. This results in a snug and a close fold and fit when the blank is folded up as hereinbefore explained, the

final folding over of the end wall portions causing no outward strain upon the extensions 18, 19 or any inward thrust upon the portions 16, 17 due to interfolding of the extensions 18, 19. The reason for forming the extensions 18 narrower than the portions 13, and the. cutting away of the extensions 19 upon the inclined lines shown, is to enable the portions 15, 16 to be folded over said extensions so as to form end walls of the same height as the side walls. This is best illustrated in Fig. 5 from which figure it will be evident that if the extensions 18',

-such as to make a deeper or shallower receptacle member or cover member of a box.

Having now described my invention what; I claim is: a

1. A box blank comprising a central portion, two side portions and two end portions, each side portion consisting of two sections having inwardly foldable extensions at their ends, the edges of the extensions which are adjacent each other being cut away, each end portion consisting of three sections, the intermediate one of which is of less length than the adjoining sections. 2. A box blank comprising a central portion, two side portions and two end portions, each side portion consisting of two sections having inwardly foldable extensions at their ends, the edges of the extensions WlllChare ad acent each other being cut away, each end portion consisting of three sections, the intermediate one of which is of less length than the adjoining sections, the lines of fold for the extensions of the side portions being nearer each other than the linesupon which the end portions are folded relatively to the central portion.

3. A paper box comprising a central portion, side walls consisting of doubled portions having inwardly turned extensions at each end, and end portions consisting of three sections folded over the inwardly turned extensions, all of" said inwardly turned extensions being of reduced width to permit the folding of the end portion sections to a height not exceeding the side walls, the intermediate sections of each end portion being of less length than the adjoining sections whereby the outer sections of the end portions are locked under the inner edges of said wall portions.

4. A box blank comprising a central portion'and creased and foldable side portions, each of the side portions having at'each end a plurality of extensions all of said extensions being narrower than the portions from which they project, the end portions being foldable over the extensions of the side portions when the latter are turned inwardly toward each other.

In testimony whereof I have aflixed signature.

HARLOW M. RUSSELL. 

